The cavity to which just

摘要

PROBLEM TO BE SOLVED: To provide an antenna device in which an orthogonal patch antenna shared by two polarized waves with a cavity only by metal and levels of crossed polarized wave components of radiation waves are low.;SOLUTION: The antenna device has: the cavity only one plane of which is opened and other surfaces are surrounded by metal walls; a radiation conductor arranged at a predetermined position on the opened plane of the cavity and a short pin composed of a conductor pillar vertically stood from the bottom of the cavity and which supports a point where a field of an electric discharge conductor becomes zero, the radiation conductor has a first supply point for exciting and radiating first linear polarized waves and a second supply point for exciting and radiating second linear polarized waves perpendicular to the first linear polarized waves.;COPYRIGHT: (C)2007,JPO&INPIT